Sciencemadness Discussion Board

how to make ferric chloride

ScopeGuy - 23-11-2015 at 19:08

I would like to try to make ferric chloride. FeCl3. can muriatic acid from the hardware store be used instead of hydrochloric acid.

I thought to used cleaned steel wool or a bunch of old rusty nails . Then filter it somehow.

My go is to make a 10 percent ferric chloride solution.

All this would be done outside.

Any suggestions on how to do this

ScopeGuy - 23-11-2015 at 19:09

also is it possible to easily make ferric chloride hexahydrate

ave369 - 23-11-2015 at 20:57

Muriatic acid is the same as hydrochloric acid, except it already contains a small amount of ferric chloride in solution. This means yes, you can use it.

10 percent ferric chloride solution is fairly easy to make. You can also make the crystalline hydrate, if you don't mind smelling hydrogen chloride a bit: ferric chloride partly hydrolyzes when boiling down the solution. It won't be 100% pure, it will be a little contaminated by ferric hydroxide.

If you want the anhydrous salt, the only way is burning iron in chlorine, however.

WGTR - 23-11-2015 at 21:02

Google search terms:

ferric chloride site:www.sciencemadness.org

Enjoy!

Marvin - 24-11-2015 at 10:49

I would expect this to produce ferrous chloride. I'm not sure about the easiest way to oxidise it, I think hydrogen peroxide can't be used. Oxygen should work but it could take a while.

Ferric chloride can be bought for etching circuit boards.

aga - 24-11-2015 at 12:28

Quote: Originally posted by WGTR  
Google search terms:

ferric chloride site:www.sciencemadness.org

http://www.sciencemadness.org/talk/viewthread.php?tid=4082
http://www.sciencemadness.org/talk/viewthread.php?tid=23462
http://www.sciencemadness.org/talk/viewthread.php?tid=13794
http://www.sciencemadness.org/talk/viewthread.php?tid=20539
http://www.sciencemadness.org/talk/viewthread.php?tid=6354
http://www.sciencemadness.org/talk/viewthread.php?tid=17686
http://www.sciencemadness.org/talk/viewthread.php?tid=2764
http://www.sciencemadness.org/talk/viewthread.php?tid=30188
http://www.sciencemadness.org/smwiki/index.php/Iron%28III%29...
http://www.sciencemadness.org/talk/viewthread.php?tid=27071

I googled and could not find anything apart from those, on page 1, of google ...

There were only 36 pages of google results for this site Only.

aga - 24-11-2015 at 12:37

Quote: Originally posted by Marvin  
I would expect this to produce ferrous chloride. I'm not sure about the easiest way to oxidise it, I think hydrogen peroxide can't be used. Oxygen should work but it could take a while..

Try google: search term =
site:sciencemadness.org ferric chloride CHRIS25

He's not around these days, however he tested FeCl3 from FeCl2 by just bubbling air throught the liquid for days on end, titrating the solution each day.

Fe(s) + HCl(aq) does produce Green FeCl2

Left exposed to Air for long enough the oxygen in the air does oxidise the iron to FeCl3 (weeks/months)

Adding H2O2 (even 3%) does the same trick instantly.

ScopeGuy - 2-12-2015 at 18:59

Thank you everyone for all the information and links. It was very helpful.